/cellspan-create {                 % => Row Col Size
  << >>
  dup /Size 3 index put
  dup /Column 4 index put
  dup /Row 5 index put
  exch pop
  exch pop
  exch pop
} def

/cellspan-get-row {
  /Row get
} def

/cellspan-get-column {
  /Column get
} def

/cellspan-get-size {
  /Size get
} def